# Proposed AD FAA-2009-0044: Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-14-03
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 23, 2009, 74 FR 8039
- Comments due: March 25, 2009
- Became: [AD 2009-14-03](https://openairdocs.org/ad/2009-14-03)
- Docket: FAA-2009-0044 (https://www.regulations.gov/docket/FAA-2009-0044, where comments are filed)
- Project: 2008-NM-132-AD
- FR document: E9-3778
- Official PDF: https://openairdocs.org/files/sha256/b4/37/b43716b58e467e6cff9cbe2592a69b7c3572019fc6c7fd5ac3003e8e92c40cf6 (from https://www.govinfo.gov/content/pkg/FR-2009-02-23/pdf/E9-3778.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/02/23/E9-3778/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-cl-600-2b16
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EF50E40327C37C0F862575660073534F.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0044

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

There have been several Stick Pusher Capstan Shaft failures causing the dormant loss or severe degradation of the stick pusher function. * * *

Dormant loss or severe degradation of the stick pusher function could result in reduced controllability of the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Feb 23, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-3778, comments due Mar 25, 2009 (https://www.federalregister.gov/documents/2009/02/23/E9-3778/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-cl-600-2b16)

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